Besides, Kawasaki swears by ProCicircut and they test all there bikes on no other then ProCircut. Kawasaki and ProCircut go hand in hand and have been doing it for many years.. Make no mistakes my friend,, FMF is just as good. It really depends on how you ride as a rider. It also matters on where you ride but i ride in lots of different terrain so i cant have 2 pipes thats why the Procircut is better in this situation. Then figure out, Are u a poker(smooth) or are u a pinner(out of control)? And then figure out from there which fits you the best. If your a poker, then get the woods pipe. If your a pinner then you have 2 options, A FMF rev pipe or a ProCircut pipe. ProCircut has won more championships then FMF ever will in many different types of racing and thats a fact..